Gozzelino Michele, Micalizio Salvatore, Calosso Claudio E, Belfi Jacopo, Sapia Adalberto, Gioia Marina, Levi Filippo
Quantum Metrology and Nanotechnologies Division, Istituto Nazionale di Ricerca Metrologica, INRIM, Strada delle Cacce 91, 10135 Turin, Italy.
Space Engineering and Atomic Clocks, Leonardo Electronics Società per Azioni, Viale Europa snc, 20014 Nerviano, MI Italy.
Sci Rep. 2023 Aug 10;13(1):12974. doi: 10.1038/s41598-023-39942-5.
We present the frequency stability performances of a vapor cell Rb clock based on the pulsed optically pumping (POP) technique. The clock has been developed in the frame of a collaboration between INRIM and Leonardo SpA, aiming to realize a space-qualified POP frequency standard. The results here reported were obtained with an engineered physics package, specifically designed for space applications, joint to laboratory-grade optics and electronics. The measured frequency stability expressed in terms of Allan deviation is [Formula: see text] at 1s and achieves the value of [Formula: see text] for integration times of 40000 s (drift removed). This is, to our knowledge, a record result for a vapor-cell frequency standard. In the paper, we show that in order to get this result, a careful stabilization of microwave and laser pulses is required.
我们展示了基于脉冲光抽运（POP）技术的汽室铷钟的频率稳定性能。该时钟是在意大利国家计量研究院（INRIM）和莱昂纳多公司（Leonardo SpA）合作框架内开发的，旨在实现一种符合空间应用要求的POP频率标准。这里报告的结果是使用专门为空间应用设计的工程物理组件，并结合实验室级光学和电子设备获得的。以阿伦偏差表示的测量频率稳定性在1秒时为[公式：见文本]，在积分时间为40000秒（去除漂移）时达到[公式：见文本]的值。据我们所知，这是汽室频率标准的一项创纪录结果。在本文中，我们表明为了获得这一结果，需要对微波和激光脉冲进行精确稳定。
